1. brumaire - Noun
2. Brumaire - Proper noun
The second month of the calendar adopted by the first French republic. It began thirty days after the autumnal equinox. See Vendemiaire.
Source: Webster's dictionaryIndeed, Marx even called the essay The Eighteenth Brumaire of Louis Bonaparte again using Engels' suggested characterisation. Source: Internet
The livre métrique was set equal to the kilogram by the decree of 13 Brumaire an IX between 1800 and 1812. Source: Internet